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Asphalt mixture is described as an elastic and viscous material. Hooke’s law and the Bailey-Norton formulation are respectively used to characterize its elastic and viscous behaviors. A numerical algorithm frame is constructed to analyze nonlinear and time dependent deformation behavior of asphalt mixture. The model parameters are determined by the uniaxial compressive creep experiments and the algorithm is validated by comparison between the numerical results and the rutting experiments. The algorithm is used to analyze rutting deformations in different types of asphalt mixture specimens under cycled wheel loads. Some preliminary studies on effects of aggregate gradation on the rutting deformation in asphalt mixture samples are conducted. Finally, some conclusions are given.

Numerical Investigation of Gradation Effects on Rutting Deformation in Asphalt Pavement